Strongs Concordance:

Given or gift of God, one of our Lord's disciples, "of Cana in Galilee" (John 21:2). He was "an Israelite indeed, in whom was no guile" (1:47, 48). His name occurs only in the Gospel of John, who in his list of the disciples never mentions Bartholomew, with whom he has consequently been identified. He was one of those to whom the Lord showed himself alive after his resurrection, at the Sea of Tiberias.

(gift of God), a disciple of Jesus Christ, concerning whom, under that name at least, we learn from Scripture little more than his birthplace, Cana of Galilee, (John 21:2) and his simple, truthful character. (John 1:47) The name does not occur in the first three Gospels; but it is commonly believed that Nathan'l and Bartholomew are the same person. The evidence for that belief is as follows: St, John who twice mentions Nathan'l, never introduces the name of Bartholomew at all. St. Matthew, (Matthew 10:3) St. Mark, (Mark 3:18) and St. Luke, (Luke 8:14) all speak of Bartholomew but never of Nathan'l. If was Philip who first brought Nathan'l to Jesus, just as Andrew had brought his brother Simon.